因式分解 2008^2-2007*2008 3.98^2-3.98*3.97 3ab^2+6a^2+ab a^3(x-y)-3a^2b(y-x) 3^2007+6*3^2006-3^20082008^2-2007*2008 (1)3.98^2-3.98*3.97 (2)3ab^2+6a^2+ab (3)a^3(x-y)-3a^2b(y-x) (4)3^2007+6*3^2006-3^2008 (5)
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![因式分解 2008^2-2007*2008 3.98^2-3.98*3.97 3ab^2+6a^2+ab a^3(x-y)-3a^2b(y-x) 3^2007+6*3^2006-3^20082008^2-2007*2008 (1)3.98^2-3.98*3.97 (2)3ab^2+6a^2+ab (3)a^3(x-y)-3a^2b(y-x) (4)3^2007+6*3^2006-3^2008 (5)](/uploads/image/z/2535629-5-9.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3+2008%5E2-2007%2A2008+3.98%5E2-3.98%2A3.97+3ab%5E2%2B6a%5E2%2Bab+a%5E3%28x-y%29-3a%5E2b%28y-x%29+3%5E2007%2B6%2A3%5E2006-3%5E20082008%5E2-2007%2A2008+%281%293.98%5E2-3.98%2A3.97+%282%293ab%5E2%2B6a%5E2%2Bab+%283%29a%5E3%28x-y%29-3a%5E2b%28y-x%29+%284%293%5E2007%2B6%2A3%5E2006-3%5E2008+%285%29)
因式分解 2008^2-2007*2008 3.98^2-3.98*3.97 3ab^2+6a^2+ab a^3(x-y)-3a^2b(y-x) 3^2007+6*3^2006-3^20082008^2-2007*2008 (1)3.98^2-3.98*3.97 (2)3ab^2+6a^2+ab (3)a^3(x-y)-3a^2b(y-x) (4)3^2007+6*3^2006-3^2008 (5)
因式分解 2008^2-2007*2008 3.98^2-3.98*3.97 3ab^2+6a^2+ab a^3(x-y)-3a^2b(y-x) 3^2007+6*3^2006-3^2008
2008^2-2007*2008 (1)
3.98^2-3.98*3.97 (2)
3ab^2+6a^2+ab (3)
a^3(x-y)-3a^2b(y-x) (4)
3^2007+6*3^2006-3^2008 (5)
因式分解 2008^2-2007*2008 3.98^2-3.98*3.97 3ab^2+6a^2+ab a^3(x-y)-3a^2b(y-x) 3^2007+6*3^2006-3^20082008^2-2007*2008 (1)3.98^2-3.98*3.97 (2)3ab^2+6a^2+ab (3)a^3(x-y)-3a^2b(y-x) (4)3^2007+6*3^2006-3^2008 (5)
2008^2-2007*2008 (1)
=2008(2008-2007)
=2008
3.98^2-3.98*3.97 (2)
=3.98(3.98-3.97)
=0.0398
3ab^2+6a^2+ab (3)
=a(3b^2+6a+b)
a^3(x-y)-3a^2b(y-x) (4)
=(x-y)a^2(a+3b)
=(x-y)(a+3b)a^2
3^2007+6*3^2006-3^2008 (5)
=3*3^2006+6*3^2006-9*3^2006
=3^2006(3+6-9)
=0
3.因式分解xy+6-2x-3y=(x-3)(y-2) 4.因式分解x2(x-y)+y2(注:若3a=2b为3a+2b,则原式=(6a+4b)(a-2b) 2、原式=4(m^2+2m
2008^2-2007*2008 =2008(2008-2007)=2008
3.98^2-3.98*3.97 =3.98(3.98-3.97)=0.0398
3ab^2+6a^2+ab=a(3b^2+6a+b)
a^3(x-y)-3a^2b(y-x) =a^2(x-y)(a+3b)
3^2007+6*3^2006-3^2008 =3^2007+6x3^2007/3-3x3^2007=3^2007(1+2 -3)=0